[agolio]

Good point, though I guess the point of the disagreement is then for me that the question's "dictionary words" implies to me an english dictionary, rather than an abstract dictionary of words of potentially infinite length

[d1sxeyes]

It would be impossible to look up anything in a dictionary of infinite length.

Therefore, either the question is nonsensical, or there must exist a word (or words) of a maximum length.